Tool



Fb. 13, 1934. w. E. MOBERLEY TOOL Filed Nov. 26, 1930 INVENTOR. Walla!E. Mow tie A TTORNEY.

Patented Feb. 13, 1934 1,946,753

UNITED STATES PATENT OFFICE TOOL Walter E. Moberley, Detroit, Mich.

Application November 26, 1930 Serial No. 498,411

4 Claims. (01. 77-58) This invention relates to improvements in tools,upper extremity oi which a semi-spherical alignand refers moreparticularly to sizing and. surlng element 4 normally rests which has aprojecfacing tools. It is an object of the invention to tion 5 on itsunderside which fits snugly into the provide a tool for sizing andsurfacing cylinders pp end of the b y 3 Which is tubular for its 3 andthe like which is intended to be fed downe e length. Between the element4 and the 60 wardly until it extends through the whole length pr c ion 5and in egral with both is a flan e 6 f e y nder to be Worked upon, toprovide which is smaller in diameter than the bore of the m ns for thenmoving cutting blades in the sleeve portionzand has its undersideresting upon tool outwardly so that the whole length or the t up xtrmity f th dy. T us, W n

19 bore is operated on simultaneously, and to pro 56 s, the y 3 iSpermitted fleet relavicle means for moving the blades inwardly againtive o the S a k hrough the body 3 a longiwhen the feed of the tool istripped and as withtudihal $1015 7 s formed through Which a p 8 drawalof the tool from the cylinder commences. p s, d t e att is a tight fi inOp s Another object of the invention is to provide 9 m d through pp sids f th sl v p r- 1. such a tool having means for moving the cutting lion2, thereby permitting limited longitudinal 1 blades radially outwardsduring the final portion m v m f y 3 r v to t ha 1- on the downwardmovement of the holder, so that A plurality of outwardly and p y taperedthe blades rotate at right angles to the axis of the a a sl ts 10 a f din th p ph y f work while cutting although their rotating holder h d 3from its we e y; d the g continues to feed downwardly through the work.lower d of he ub a b y 3 s bor ut a Other objects of the invention areto provide ar diam ter a d i te a y thr aded as shown such a tool:wherein means are provided for setat 11 to receive an annular nut 12. Inthe bot ting the blades so that when moved to their outt of the S1068 l0Wedges 14 a p d t ward limit they will cut a hole of the de ir d innersides of which are inclined longitudinally a diameter after beingreground, o that a La to conform to the taper of the slot bottomsagainst number of regrinds on the blades may be had; which they rest,and their outer faces are also and wherein provision is made forcontinued feed up y a wa y inclined th h to a of the upper end of theho1der, if the feed stop lesser extent than their inner sides. Cuttingis not quite accurately set, after the cutting blades blades 15 aremounted in the slots 10 with their a have reached their outward cuttingposition, nn de e g a a t t e Outer Sides of without moving the latteror the lower portion the wedges 14; these blades of course project beofthe holder any further downwards through the y nd their sl s o wa ly, nr longer n work. the wedges 14. The lower ends of the wedges 14 Withthese and other objects and advantages r st n th H t 2, a he former areshorter in view which will become apparent as the specifithan the slots10 so that by movement of the cation proceeds, the invention ishereinafter more said nut the wedges may be raised thereby movfullydescribed with the aid of the accompanying ing the blades 15 outwardly.Two annular redrawing, in which: cesses 16 are formed around the body 3.Through Figure 1 illustrates a longitudinal section of the blades 15apertures 17 are formed for the o the tool on the line 11 of Figure 3.passage of helical springs 18 which encircle the Figure 2 is a sectionof the body of the holder tool and are suitably joined at theirextremities. on the line 2-2 of Figure 3. These springs 18 hold theinner sides of the blades Figure 3 is a section on the line 3-3 of Fig-15 against the wedges l4, and the latter against ure 1. the bottoms oftheir slots 10. 5 Figures 4 and 5 are side elevations of the slid-Longitudinally movable in the bore of the lower ins co l an shank sp ivly. portion ofthe body 3 is a pilot 19 having a Referring to thedrawing, 1 designates a tool longitudinal slot 20 therethroughintermediately shank which fits into a spindle (not shown) of a of itslength through which a pin 21 extends machine in which my tool is to beemployed. At which is supported in openings 22 formed through 5 thelower extremity of the shank 1 and concenopposite sides of the body 3thereby permitting trio with the latter is a sleeve 2 open at its lowerlongitudinal movement of the pilot 19 in the extremity. Mounted in thesleeve 2 is the upper said body. Integral with the pilot 19 at its lowerend of a body 3 the outside diameter of which is extremity is a flange23 which rests against the preferably very slightly smaller than thebore of undersides of the blades 15, and extending down- 55 the sleeve 2adjacent but spaced from the closed wardly from the said flange is aguide 24 which is movable longitudinally through a suitable bearing 25provided in the work table 26.

The blades 15 project below the body 3 and are held in that position byspring tension in a manner hereinafter described. When the pilot 19 andflange 23 are lowered so that the latter rests against the top of thework table 26 continued downward movement of the flange becomesimpossible. Then the latter holds the blades 15 against further downwardmovement so that continued movement in that direction of the body 3 andwedges l4 forces the blades 15 upwardly relative to the body and thusoutwardly.

Around the body an externally threaded portion 27 is provided towardsits upper end through which the upper extremities of the slots 10extend. 28 denotes an annular nut in threaded engagement with thethreaded portion 2'7. A sliding collar 29 is arranged around the body 3above the nut 28, and has a lower annularly enlarged portion 29a whichencircles the said nut. The underside of the said enlarged portion 29arests against the upper extremities of the blades 15. Through theperiphery of the enlarged portion 29a circumferential slots 30 areformed to afford access to radial apertures 31 in the nut 28 so that thelatter may be readily rotated, since this nut limits the upward movementof the blades 15 in their slots 10.

Between a flange 1a which extends outwardly around the shank 1 and ashoulder 29b formed at the upper end of the enlarged portion 29a of thesliding collar a helical spring 32 is arranged, so

, that as the blades 15 are moved upwardly relative to the body 3 thespring becomes gradually more compressed until the blades 15 strike thenut 28; then, if the downward movement of the tool is continued, furthercompression is exerted on the spring 32 by downward movement of theshank 1 and sleeve 2 relative to the body 3, which is permitted bydownward movement of the pin 8 in the body slot 7, until the closedupper end of the sleeve 2 strikes the top of the element 4. Thesemi-spherical form of the latter is only of use when the latter occurs,and eliminates any tendency for the body 3 to turn relative to theshank 1. It will also be noted that the spring 32 must be sufficientlystrong to carry the feed of the blades 15 as they are gradually movedupwardly in their slots 10.

It is believed that the operation of the tool will be readily understoodfrom the foregoing description, briefly it is as follows: The tension ofthe spring 32 normally holds the pin 8 at the upper end of the body slot7 so that the element 4 is spaced from the closed upper end of thesleeve 2, and also holds the blades 15 downwardly relative to the body 3through the lower extremity of the annular portion 29a of the slidingcollar 29 which then projects below the nut 28. Rotation of the shank 1is transmitted to the body 3 through the pin 8. When the blades 15 arein their downward position relative to the body 3 the pilot 19 is alsoin its downward position so that the pin 21 is resting against the topof the pilot slot 20. In Figure 1 the pin 21 is shown just after theflange 23 has contacted the top of the work table 26 and consequentlythe flange has commenced to move the blades 15 upwardly, and thereforeoutwardly, relative to the body 3. During the upward movement of theblades 15 relative to the body 3 the springs 18 move upwardly in theirrecesses 16 to the position indicated at 18a. The wedges 14 do not movein their slots 10 but remain with their lower extremities against thenut 12. Firstly, because the taper on the inner sides of the wedges issteeper than on their outer sides, and secondly, because the inner sidesof the blades are of a smoother finish than either the sides of thewedges or the bases of the slots 10. By adjusting the position of thenut 28 the top outward positions of the blades 15 is varied; and, aspreviously stated, adjustment of the nut 12 moves the wedgeslongitudinally, so that adjustment may be made after the blades havebeen reground.

After the blades 15 have contacted the nut 28 any continued downwardfeed of the machine spindle moves the shank 1 downwardly relative to thebody 3 as permitted by the slot 7 and pin 8. When the tool starts tomove upwardly again the spring 32 returns the pin 8 to the top of theslot 7 and moves the blades 15 downwardly, and also inwardly due to thetension of the springs 18, until the pilot 19 moves sufficiently for thepin 21 to contact the top of the slot 20.

A denotes a cylinder which is being sized and surfaced by he blades 15from which it may be seen that the latter are longer than the cylinderso that the whole length of the bore is operated on simultaneously.

While in the foregoing the preferred embodiment of the invention hasbeen described and shown, it is understood that the construction issusceptible to such alterations and modifications as fall within thescope of the appended claims.

What I claim is:

1. A tool of the character described comprising a body adapted to bemoved axially and having substantially longitudinal slots in itsperiphery, blades seating in said slots and projecting outwardlytherefrom, said blades having cutting edges formed along their outermargins, the bases of both the slots and the blades being longitudinallyinclined so that as the blades are moved longitudinally in the slots theradial distance of their cutting edges from the body axis varies, apilot movable longitudinally in one extremity of said body, a flange onsaid pilot against which one end of each blade rests, a sliding collararound said body one extremity of which rests against the end of eachblade remote from said flange, spring means tending to move said collarand blades and through the latter to move said flange away from saidbody, means limiting the distance the flange may be moved from saidbody, and means for preventing longitudinal movement of said flange withsaid body after the latter has been moved axially a predetermineddistance in one direction so that the adjacent extremity of the bodymoves nearer to said flange thereby moving said blades longitudinallyand outwardly in their slots to bore work to a predetermined size, saidspring means returning said blades longitudinally when said bodycommences to travel axially in the opposite direction, and means formaintaining said blades in seated position in their slots at all timesso that as said ioo its

blades are returned to their initial position their cutting surfaces aremoved away from the bore of the work.

2. In a tool of the character described, the combination of a bodyhaving substantially longitudinal slots therein, cutting blades mountedin said slots and projecting therefrom, the bases of both the slots andthe blades being longitudinally inclined so that as the blades are movedlongitudinally in the slots the radial distance of their cutting edgesfrom the body axis varies,

a sliding collar around said body, one extremity of which rests on oneend of said blades, a flange adjacent one end of said body, a springextending between said flange and said collar tending to move saidcollar and blades in one direction, a pilot movable axially in the otherend of said body, means limiting said axial movement, and another flangeon said pilot against which the extremities of the blades remote fromthe sliding collar rest.

3. A tool comprising a body having substantially longitudinal slotsformed therein, blades seated in said slots and projecting therefrom,the bases of both the slots and the blades being longitudinally inclinedso that as the blades are moved longitudinally in their slots the radialdistance of their cutting edges from the body axis varies, cutting edgesformed along the outer margins of said blades, a pilot movablelongitudinally relative to said body, means on said pilot for contactingone extremity of each blade and moving said blades longitudinally andoutwardly of said body, a shank movable longitudinally on the otherextremity of said body, an annular enlargement on said shank, a springaround said body one extremity of which rests against said annularenlargement and the opposite end of which exerts pressure against theends of the blades remote from the pilot, so that movement of the latterin one direction relative to the body by which the blades are movedoutwardly compresses said spring, said spring tending to return saidblades and move said pilot in the opposite direction, and means holdingsaid blades seated in their slots at all times.

4. A tool of the character described comprising a body adapted to be fedaxially and having substantially longitudinal slots formed therein thebases of said slots being fiat throughout their entire length butinclined to the axis of the body, blades longitudinally slidable in saidslots, the bases of said blades resting on the slot bases, one extremityof each blade projecting beyond said body, one end of said body beingaxially apertured, a pilot axially movable in said aperture, a flange onsaid pilot resting against the extremities of the blades so that whenthe pilot is moved further into the aperture the blades are moved intheir slots, and, due to the inclination of the slot bases, the bladesare then moved axially outward, and a collar resiliently mounted aroundsaid body resting against the extremities of the blades remote from theflange tending to return the blades to their initial positions in theirslots, said blades then moving the flange and pilot to their initialpositions.

WALTER E. MOBERLEY.

